I have Maximum Motorsports coilovers on Bilsteins with 350lb springs in the front and 575lb in the rear with a Cobra IRS. The ride quality is amazing (even when I was running the solid axle with just the coilovers in the front) over my Eibach Pro-Kit and even the stock springs. The adjustability in ride height is also really nice, and the increase in steering feel and response with the coilovers (even with just cobra control arms and stock K-member, and no strut tower brace or anything) is amazing, it's like a completely different car. Oh, and never EVER having to use a F'in spring compressor EVER again when working on the suspension....priceless.